Split laptop/work into independent stow packages with shared/ base

- Remove work/laptop detection logic from nvim and emacs configs; each
  package now has a self-contained init that requires no runtime checks
- Create shared/ stow package containing nvim/init.lua, emacs/init.el,
  common-dev-settings.el, org-bindings.el, tmux, ghostty, and ranger
- Rename laptop-languages.lua / work-languages.lua → languages.lua in
  each package; shared/init.lua uses require('languages') generically
- Rename work-dev-settings.el → dev-settings.el to match laptop naming
- Expand work/ to include the full set of dev tools (tmux, ghostty,
  ranger, emacs, neovim) without email/calendar tooling
- Add Makefile with `make laptop` and `make work` targets (each runs
  a single `stow shared <profile>` invocation)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

work/.config/emacs/dev-settings.el

@@ -1,4 +1,4 @@
-;;; work-dev-settings.el --- Work/WSL development environment
+;;; dev-settings.el --- Work development environment (C#, TypeScript, JavaScript, CSS, HTML)
 
 ;;; C#
 ;; LSP server: dotnet tool install -g csharp-ls
@@ -58,5 +58,5 @@
          (css-ts-mode        . prettier-mode)
          (html-ts-mode       . prettier-mode)))
 
-(provide 'work-dev-settings)
-;;; work-dev-settings.el ends here
+(provide 'dev-settings)
+;;; dev-settings.el ends here